What Is a Bonus Issue?

A bonus issue is when a company gives existing shareholders extra shares, free of cost, in a fixed ratio to what they already hold. If you own shares before the record date, you simply receive more shares in your demat account without paying anything for them. Nothing about your ownership share of the company changes, and nothing about the company's total value changes either. The stock price adjusts downward to reflect the larger number of shares outstanding, so the "free shares" feeling is real, but the wealth effect is not.

The company funds this by converting a part of its reserves or accumulated profits into share capital. It's a bookkeeping move dressed up as a shareholder reward, and understanding that distinction is the whole point of this page.

Why Companies Issue Bonus Shares

A company doesn't hand out bonus shares out of generosity. There are a few practical reasons boards choose this route.

The most common one is bringing the share price into a more "tradeable" range. A stock that has run up for years can start to look expensive on the screen, even if the underlying business is fine. A bonus issue increases the share count and lowers the per-share price, which can make the stock feel more accessible to smaller investors, even though the actual value held by each shareholder hasn't moved.

Another reason is signalling. A board announcing a bonus issue is often signalling confidence in future earnings, because it's converting reserves into a permanent increase in share capital rather than paying it out as a one-time dividend. It can also improve liquidity, since more shares in circulation generally means more shares changing hands each day.

None of this changes the fundamental math. The company's market capitalisation, in theory, stays the same the moment the bonus is issued. Only the number of slices the same pie is cut into changes.

How the Ratio Works: A Worked Example

Bonus issues are announced as a ratio, like 1:1, 1:2, 2:1, 1:5, or 5:1. The first number is the bonus shares you get; the second is how many existing shares you need to hold to qualify for that many.

Say you hold 100 shares and the company announces a bonus issue in the ratio 1:2. That means for every 2 shares you hold, you get 1 extra share. On 100 shares, you'd receive 50 additional shares, taking your total to 150 shares.

Now try a richer ratio. If you held 200 shares and the company announced a 1:1 bonus, you'd receive 200 more shares, doubling your holding to 400 shares. Your percentage ownership of the company is unchanged; you simply hold twice as many pieces of the same pie. If the share price was trading near a round number before the bonus, the market typically re-prices it to roughly half that level right after, so the total value of your holding stays broadly the same as before the announcement took effect.

A 5:1 ratio works the other way around and is rare for a bonus issue, since it would mean getting five new shares for every one you hold, a very large dilution of the per-share price. Most companies pick modest ratios like 1:1, 1:2, or 1:5 precisely because a huge jump in share count without a matching jump in business size can create its own confusion in the market.

Record Date and Ex-Date: When You Actually Qualify

Like any corporate action, a bonus issue runs on specific dates, and missing the difference between them is where new investors often go wrong.

The record date is the date the company uses as its cut-off; if you're a shareholder on that date, you qualify for the bonus shares. The ex-date is the date from which the stock trades without the entitlement attached, and in practice this is the date that decides whether a fresh buyer gets the bonus or not. If you buy on or after the ex-date, the bonus has already been priced out of the stock, and you won't receive it even though the record date hasn't technically arrived yet in older settlement conventions.

The safest habit is to treat the ex-date, not the announcement date, as the real deadline. The announcement tells you what's coming; the ex-date tells you whether you're still in time to benefit from it. For a broader look at how companies disclose these events, Bharatstox's guide to NSE corporate announcements covers how the filing itself is worded and where to find it.

What Happens to the Share Price and EPS

The market doesn't let a bonus issue create free value out of nowhere. On the ex-date, the exchange adjusts the stock's price downward in proportion to the bonus ratio, so a shareholder's total holding value stays roughly where it was.

Earnings per share (EPS) gets diluted for the same reason. If the company's total profit hasn't changed but the share count has gone up, the profit is now split across more shares, so EPS falls even though the business itself hasn't weakened. Analysts routinely restate historical EPS figures after a bonus issue so that year-on-year comparisons still make sense. If you're reading a company's numbers around a bonus event, check whether the EPS you're looking at has already been adjusted for the new share count, otherwise you'll misread the trend.

Bonus Issue vs Stock Split vs Dividend vs Rights Issue

It helps to place a bonus issue next to its closest relatives, because they're easy to mix up.

Action	What you get	Do you pay?	Effect on share count	Effect on price
Bonus issue	Extra shares from reserves	No	Increases	Adjusts down proportionally
Stock split	More shares from splitting existing ones	No	Increases	Adjusts down proportionally
Dividend	Cash (or sometimes stock, if structured that way)	No	Usually unchanged	Small adjustment for the cash paid out
Rights issue	Right to buy new shares	Yes, at the offer terms	Increases only if you subscribe	Adjusts for dilution

A bonus issue and a stock split look almost identical in effect: both increase share count and lower price without changing the underlying business value. The technical difference is accounting, a split just divides the existing face value into smaller units, while a bonus issue capitalises reserves into brand-new shares. A dividend, by contrast, hands you cash and doesn't touch your share count. A rights issue is the odd one out, because it asks you to pay for new shares rather than giving them to you free, and if you skip it, your ownership percentage can actually shrink. Bharatstox's corporate action events guide walks through all four side by side if you want the fuller comparison.

Does a Bonus Issue Have Tax Implications?

Receiving bonus shares themselves is generally not treated as income at the time of allotment, since you haven't paid anything and haven't received a cash benefit. The tax question usually shows up later, when you sell the shares, and it depends on how the cost basis and holding period are calculated for the bonus shares versus your original shares. Tax rules can change and the treatment can get technical, so this is one area worth checking with a SEBI-registered adviser before you act, rather than assuming a blanket rule applies to your situation. Bharatstox's guide on SEBI-registered research analysts is a useful starting point if you want to understand how registered advice differs from informal market chatter.

This is for informational and educational purposes only and not investment advice. Consult a SEBI-registered adviser before investing.